.list_box{
  display: flex;
  justify-content: center;
  align-items: center;
}
.artForm{
  width: 30rem;
  margin: 0% auto;
  background-image: url(../img/modify_form.jpeg);
  background-size: cover;
  font-family: sans-serif;
  font-weight:100;
  box-shadow: 0 0 0.3rem 0 black;
}
h1{
  letter-spacing: 0.5vw;
  text-align: center;
  font-weight: lighter;
}
input{
  height: 2rem;
  border: none;
  font-size: 1rem;
  border-radius: 3px ;
  outline-color: #2679B1 ;
  outline-width: 1.5px;
  transition: height 0.15s;
}
input:not(.button){
  text-indent: 0.5rem;
}
span{
  font-weight: 100;
}
/* 
表单样式
*/
label,.button_box{
  display: flex;
  flex-direction: column;
  max-width: 80%;
  margin: 1rem auto;
}

/* 
提交按键
*/
.button_box{
  margin-top: 2rem;
  flex-direction:row;
}
.button{
  text-indent: 0;
  text-align: center;
  width: 4rem;
  height: 2rem;
  background-color: #2679B1 ;
  color: wheat;
  cursor: pointer;
}
.button{
  margin-right: 1rem;
  transition: background-color 0.1s,
  color 0.1s;
}
.button:hover{
  background-color: red;
  color: white;
}

/* 
动画
*/
input:not(.button){
  height: 0;
  padding: 0;
  border-bottom: 1px solid black;
}
label:hover input{
  height: 2rem;
}